我书落家了!
题目
我书落家了!
新概念第2册第2课课文
还要翻译
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全部的课文吗?It was Sunday.I never get up early on Sundays.I sometimes stay in bed until lunch time.Last Sunday,I got up very late.I looked out of the window.It was dark outside."What a day!"I thought...
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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